The SDL Component Suite is an industry leading collection of components supporting scientific and engineering computing. Please visit the SDL Web site for more information.... |
Home MathPack Fourier Properties RealSpec | |||||||||||
See also: ImagSpec, FourSerCosCoeff, PowerSpec, RealMax, RealMin, FData | |||||||||||
RealSpec |
|||||||||||
The array property RealSpec provides access to the real part of the spectrum. The index ix may assume values between 1 and SpectrumSize. Accessing any value of the array below 1 and above SpectrumSize will result in a zero value on read, or in no action on write. Note: Since the index of the data buffer starts with 1 (and not 0), the index of the harmonics of the resulting Fourier spectrum is shifted by one. Thus the constant coefficient a0 is stored in RealSpec[1], the first harmonic in RealSpec[2], the second in RealSpec[3], and so on.
The figure below shows the order of the frequency components as they are stored in RealSpec after performing a Fourier transform:
|